A child’s paternity is in question. The chart below was constructed to shed some light on the situation.

Question

anonymous · Answer

ABO blood type 	Rh type    Eye colour	  MN blood type Earlobes	Cheeks	Chin
Mother	     A	                  Pos	             Blue	           M	           Fixed	Smooth	Round
Child	O	     O                   Neg	     Brown 	          MN	            Free	Smooth	Cleft
Casanova	     B	                  Neg	     Brown	            N	           Fixed	Smooth	Cleft
Don Juan	     O	                  Pos	             Blue	          MN	            Free	Smooth	Cleft
Romeo	     B	                  Pos	             Brown	           N	            Free	Dimples	Cleft
Baryshnikov  AB	          Neg 	     brown	           M	            Free	Dimples	Round
Valentino	     B	                  Neg	     Brown	           M	            Free	Smooth	Round
Homer	    O	                   Pos	     Brown	           N	            Free	Dimples	round

Note:    Brown eyes dominant over blue eyes
	Free earlobes dominant to fixed 
        Chin cleft dominant to round
        Rh+ is dominant to Rh-
	Dimples dominant to smooth

anonymous · Answer

Someone help D:

anonymous · Answer

well what exactly are the child's ABO, Rh, eye color, MN blood type, earlobes, and cheeks?

anonymous · Answer

to know that first would help immensely to figure out the problem you have at hand

anonymous · Answer

Child is O, Negative, Brown, MN, Free, Smooth, and Cleft.

anonymous · Answer

Mother is A, Pos, Blue, M, Fixed, Smooth, and Round.

anonymous · Answer

I believe Baryshnikov is out of the question because he has the AB blood type... and he cannot reproduce an O blood type.. but then the mom is A blood type so there is a possibility.. noo.

blues · Answer

The first thing to do is figure out all possible combinations of alleles which give rise to the mom's and kid's phenotypes, and then determine which of the kid's alleles must have come from the Dad. 

She's either AA or AO, ++ or +-, bb, MM, ff (with small 'f' referring to 'free' and big 'F' referring to fixed) and rr (with small 'r' referring to round). 

The kid is OO, --, bB, MN, Ff and rR. 

So from Dad, the kid got an O, -, B, N, F and R.

blues · Answer

Then you go down the list of potential fathers and see which one of them could have contributed each of these alleles.

For example, from looking at blood type, you're right that being AB removes Baryshnikov from consideration. It does not remove anyone else. Your teacher probably expects you to list the possible genotypes for each father as well but I'm not that picky; I suggest making a list of possible fathers and crossing out each candidate as he is eliminated...

blues · Answer

For example, Cassanova is out over the question of earlobes, Don Juan is out over the question of eye color, and having shown you the way I think you can probably do the rest yourself.

anonymous · Answer

ohhhh, i see. I think I get it now, thank you! :)

anonymous · Answer

I didn't learned the MN blood type, if an individual is "M" it is MM, "N" is NN, and "MN"?